Should be called A "Great" Harvest to match how amazing this card is. I believe is is one of the most underrated cards currently, in the sense that even though people are using it, I believe it to be the best Neutral card in the game and should be in even more decks than Core Set Gandalf.
I use it all the time in solo play to get out Steward of Gondor without a leadership hero. Resource generation is one of the best things about the leadership sphere, and you get access to its best card without even bringing a hero. It feels like cheating.
I've also found it great for resource smoothing in tri-sphere decks. If you have Steward on one of your heroes, you might end up with a big resource imbalance. So you can use Good Harvest to spend that pile of resources on cards from the other spheres.
A mono-spirit deck can get Asfaloth into play pretty easily.
It single-handedly opens up entire new deck archetypes. You can make a true solo tactics deck that does well in questing by using A Good Harvest to play Blade that was Broken onto Tactics Aragorn. This would basically be impossible with Song of Kings.
It allows you to mess with the cards that say "Use resources from 3 different hero's resource pools to pay for this card". You can throw A Good Harvest and Shadows Give Way into any deck and it can make a huge difference against Carn Dum, or any quest with bad shadow effects.
What do people think of this card? Have people discovered other uses for it?